Question

Average age of a class of 20 students is 14 years. If the teacher's age is included. the average age increase boy 1. Want is the age of the teacher?​

Answer 1

Answer:

35 years

Step-by-step explanation:

Avg. age of 20 students = 14 years

So, total ages = 20×14 = 280 years

Now, teacher added. The no. of persons increased by 21 and avg. age increased by 15.

Here, the total ages = 21×15 = 315 years

Age of teacher= 315-280 = 35 years